According to the recommendations of the American Academy of Pediatrics (AAP) on infant nutrition:

Infants fed on formula should be started on solid food sooner than breastfed infants.

If infants are weaned from breast milk before 12 months, they should receive cow's milk, not formula.

After 6 months, mothers should shift from breast milk to cow's milk.

Infants should be given only human milk for the first 6 months of life.